import axios from 'axios'
import { MessageBox, Message } from 'element-ui'
import store from '@/store'
import { getToken } from '@/utils/auth'
import qs from 'qs'
// create an axios instance
//创建一个axios实例
const service = axios.create({
  baseURL: process.env.VUE_APP_BASE_API_PRO, // url = base url + request url
  // withCredentials: true, // send cookies when cross-domain requests
  timeout: 5000, // request timeout,
  withCredentials: true //解决sesson不一致的问题
})

// request interceptor
//请求发送之前的拦截器
service.interceptors.request.use(
  config => {
    // do something before request is sent
    //如果token存在，把token添加到请求的头部
    if (store.getters.token) {
      // let each request carry token
      // ['X-Token'] is a custom headers key
      // please modify it according to the actual situation
      config.headers['token'] = getToken()
    }
    return config
  },
  error => {
    // do something with request error
    console.log(error) // for debug
    return Promise.reject(error)
  }
)

// response interceptor
//请求返回之后的处理
service.interceptors.response.use(
  /**
   * If you want to get http information such as headers or status
   * Please return  response => response
  */

  /**
   * Determine the request status by custom code
   * Here is just an example
   * You can also judge the status by HTTP Status Code
   */
  response => {
    const res = response.data

    // if the custom code is not 20000, it is judged as an error.
    if (res.code !== 200) {
      Message({
        message: res.msg || '服务器出错',
        type: 'error',
        duration: 5 * 1000
      })

      //600是token过期或token验证失败 50008: Illegal token; 50012: Other clients logged in; 50014: Token expired;
      if (res.code === 600) {
        // to re-login
        MessageBox.confirm('您的登录信息已过期，请重新登录！', '系统提示', {
          confirmButtonText: '去登录',
          cancelButtonText: '取消',
          type: 'warning'
        }).then(() => {
          store.dispatch('user/resetToken').then(() => {
            location.reload()
          })
        })
      }
      return Promise.reject(new Error(res.msg || '服务器出错'))
    } else {
      return res
    }
  },
  error => {
    console.log('err' + error) // for debug
    Message({
      message: error.msg || '服务器出错!',
      type: 'error',
      duration: 5 * 1000
    })
    return Promise.reject(error)
  }
)

//请求方法
const http = {
    post(url, params) {
      return service.post(url, params, {
        transformRequest: [(params) => {
          return JSON.stringify(params)
        }],
        headers: {
          'Content-Type': 'application/json'
        }
      })
    },
    put(url, params) {
      return service.put(url, params, {
        transformRequest: [(params) => {
          return JSON.stringify(params)
        }],
        headers: {
          'Content-Type': 'application/json'
        }
      })
    },
    //parm =>  {id:10}
    // http://localhost:8089/api/user?id=10
    get(url, params) {
      return service.get(url, {
        params: params,
        paramsSerializer: (params) => {
          return qs.stringify(params)
        }
      })
    },
    //parm =>  {id:10}
    // http://localhost:8089/api/user/10
    getRestApi(url, params) {
      let _params
      if (Object.is(params, undefined || null)) {
        _params = ''
      } else {
        _params = '/'
        for (const key in params) {
          console.log(key)
          console.log(params[key])
          // eslint-disable-next-line no-prototype-builtins
          if (params.hasOwnProperty(key) && params[key] !== null && params[key] !== '') {
            _params += `${params[key]}/`
          }
        }
        //去掉参数最后一位?
        _params = _params.substr(0, _params.length - 1)
      }
      console.log(_params)
      if (_params) {
        return service.get(`${url}${_params}`)
      } else {
        return service.get(url)
      }
    },
    //parm =>  {id:10}
    // http://localhost:8089/api/user/10
    delete(url, params) {
      let _params
      if (Object.is(params, undefined || null)) {
        _params = ''
      } else {
        _params = '/'
        for (const key in params) {
          // eslint-disable-next-line no-prototype-builtins
          if (params.hasOwnProperty(key) && params[key] !== null && params[key] !== '') {
            _params += `${params[key]}/`
          }
        }
        //去掉参数最后一位?
        _params = _params.substr(0, _params.length - 1)
      }
      if (_params) {
        return service.delete(`${url}${_params}`).catch(err => {
          // message.error(err.msg)
          return Promise.reject(err)
        })
      } else {
        return service.delete(url).catch(err => {
          // message.error(err.msg)
          return Promise.reject(err)
        })
      }
    },
    upload(url, params) {
      return service.post(url, params, {
        headers: {
          'Content-Type': 'multipart/form-data'
        }
      })
    }
  }
  export default http
